There’s a bitter battle going on between prankster Justin Bieber and little superstar Willow on their world tour!

After 10-year-old Willow Smith tried to trick Justin Bieber at a show last week, the 16-year-old decided it was payback time. “So the other day @officialwillow decided to try and prank me. PRANK ME!! lol,” Justin wrote on his Twitter, “Well now is PHASE 1 of my REVENGE!! Manchester get ready!!” And he got revenge alright — but now it’s Willow’s turn!

Justin and Willow’s 12-year-old brother Jaden Smith sneaked on the stage wearing face paint while she performed in Manchester, UK on Sunday, March 20, and now the petite superstar is plotting up her own scheme.

“My big brothers Justin and Jaden pranked me on stage tonight,” she wrote on her Facebook page, “… payback!!!” What will she do?